Shear-blade corrugator



March 5, 1929. H. D. MITCHELL 1,704,334

SH AR BLADE CORRUGATOR Filed Oct. 17, 1927 2 Sheets-Sheet 1 2 INVIZNTOR.

- Heir/y D Michell; B Y

A TORNE Y March 5, 1929. H. D. MITCHELL 33 SHEAR BLADE conauem'on Filed 0ct.17, 1927 2 Sheets-Sheet. 2

IYNVENTOR. Harry B Mitchell; BY

A TTORNE YT Patented Mar. 5, 1929.

UNITED STATES HARRY D. MITCHELL, OF HERMOSA BEACH, CALIFORNIA.

SHEAR-BLADE CORRUGATOR.

Applicationv filed October 17, 1927. Serial No. 226,769.

My invention relates to a machine primarily designed for corrugating barbers shears, and the object thereof is to provide a machine by means of which an unskilled person may be able to corrugate a pair of barber shears as perfectly as the most skilled operator can now do with the devices in use.

In the drawings forming a part of this application Fig. 1 is a side elevation of my improved machine with the file omitted Fig. 2 is a top plan of Fig. 1, Fig. 3 is an end view of Pi 1, Fig. 4 is an enlarged central vertical section with a corrugating file positioned therein. 5 to 8 are detail views of portions of the machine.

Referring to the drawings a clamp 10 is used for securing the machine to a table or shelf 11. Toclamp 10 is secured the fixed member 12 of a vice having a movable member 13. Members 12 and 13 have jaws 14' and 15 which are preferably lined on their opposed faces by wooden strips 16 which prevent the iron jaws of the vice from contacting with the shear blades when being corrugated. A bolt 17 and winged nut 18 provide means to clamp the jaws on the shear blades. From the ends of jaw 14 project brackets 19 and 20 (best shown in Fig. 2) in which is mounted the guide and positioning rod 21 that has positioning notches 22 in one side thereof. Slidably mounted on rod 21 is fitting 23 which has projecting from one side thereof a threaded stud 24, which projects through a slot 25 in the shank 26 of the head 27 of the carrier positioner, in which the tile carrier reciprocates and to which it is adjustably secured. Stud A is held positioned in slot by wing nut 29, carrier 28 passes through the top of shank 26 in an aperture 30. Carrier is of metal and has a slot 31 therein which is wider at the bottom than at the top (see Fig. 8) in which is received a guide bar 32 on which carrier 28 moves when the shear blades are being corrugated. Bar 32 is adjustably held upon head 27 by screw 33 and wiugnut 34. By changing the position of the bar 32 the direction of the reciprocation of carrier 28 is changed so that the direction of the corrugations in the shear blade is likewise changed. At the front end of carrier 28 is a pocket in which the front end of the corrugating file 36 is received. The rear end of tile 36 passes through a loop 37 mounted on the rear end of the carrier. In register with loop 37 carrier 28 has a threaded hole 38 in which is received a clamping screw 39 which holds the tile positioned for use. File 36 has a line of cutsextending longitudinally the tile and other cuts extending angularly to the line ofQlongitudinal cuts. Other 6 forms of tiles may be used by having other adjustably means for attaching the sameto carrier 28 so that a line of cuts ot the file shall will disengage from a notch in rod 21 the carrier and fitting can be slid along rod 21 so as to cause the 5 ring to engage in another notch in rod 21 w ien the carrier is brought again into operative position and thereby enable the operator to corrugate a new section of shear blade.

l laving described my invention Iclainl,

A shear blade corrugator, comprising a clamp; a vice secured to said clam a positioning rod secured to said vice, sair rod having a plurality of notches in one side thereof a fitting slidingly mounted on said rod; a

spring secured to said fitting and having its free end bent to enter a notch in said rod when thccorrugator is positioned for use; a carrier positioncr adjustably mounted on said fitting; a tile carrier slidable through and ad ustahly mounted on said positioner. and

a corrugating file secured to said carrier.

In witness that I claim the foregoing I have hereunto subscribed my name this'i'th day of Oct. 1927.

HARRY MITCHELL, 

